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7 (another Prime Pages' Curiosity) |
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Single Curio View: (Seek other curios for this number) The only prime that can be the digital root (sum of digits computed recursively until one digit remains) of a perfect square. [Rupinski]
Submitted: 2003-03-06 22:41:13; Last Modified: 2009-02-17 20:18:12.
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